Wiring harnesses

This reminds me of myself a few years back.
Not a mopar but I also have a 64 Fairlane, and I put in a new fancy radio with the plug ins for my phone, etc. I was patting myself on the back as I was cruising my neighborhood when all of a sudden things started to get dim and everything just slowly quit working... hahahaha
I hiked home and came back with a jumper pack after I unplugged the radio!
I just threw in a one wire 100 amp alt and its been perfect ever since. I didn't have to change any of my original wiring either.
Good luck!